Ragweed
One of the most prominent fall allergens is ragweed. Ragweed plants produce an abundant amount of lightweight pollen that can travel hundreds of miles on the wind. Ragweed tends to bloom from late summer to the middle of fall and grows just about everywhere. The first winter frost usually ends the ragweed allergy season but in the South or Southwest, where temperatures are warmer, ragweed can continue to pollinate into the winter months.
